Deadly H5N1 may be brewing in cats

Bird flu hasn't gone away. The discovery, announced last week, that the H5N1 bird flu virus is widespread in cats in locations across Indonesia has refocused attention on the danger that the deadly virus could be mutating into a form that can infect humans far more easily.

In the first survey of its kind, an Indonesian scientist has found that in areas where there have been outbreaks of H5N1 in poultry and humans, 1 in 5 cats have been infected with the virus, and survived. This suggests that as outbreaks continue to flare across Asia and Africa, H5N1 will have vastly more opportunities to adapt to mammals than had been supposed.

Chairul Anwar Nidom of Airlangga University in Surabaya, Indonesia, told journalists last week that he had taken blood samples from 500 stray cats near poultry markets in four areas of Java, including the capital, Jakarta, and one area in ...

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